Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn3O4, Mn3O4-CeO2, and CeO2 Catalysts in Tight Contact Conditions

被引：0
作者：
Rotko, Marek [1 ]
Karpinska-Wlizlo, Karolina [1 ]
机构：
[1] Marie Curie Sklodowska Univ, Inst Chem Sci, Fac Chem, Dept Chem Technol, 3 Maria Curie Sklodowska Sq, PL-20031 Lublin, Poland
来源：
MOLECULES | 2025年 / 30卷 / 02期
关键词：
diesel soot oxidation; CeO2; Mn3O4; Mn3O4-CeO2; ITKA; MESOPOROUS MANGANESE OXIDES; DIESEL SOOT; COMBUSTION; OXYGEN; CO; CERIUM; ROLES;
D O I：
10.3390/molecules30020343
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The reaction mechanism of soot oxidation on Mn (Mn3O4), Mn-Ce (Mn3O4-CeO2), and Ce (CeO2) catalysts in tight contact conditions was investigated using ITKA (isotopic transient kinetic analysis). The obtained results suggest that lattice-bulk oxygen from all studied catalysts takes part in the soot oxidation process but with varying relative contributions: for the Ce catalyst, this contribution is practically 100%, whereas with decreasing Ce content in Mn-Ce catalysts, the significance of lattice-bulk oxygen for soot oxidation diminishes. For the Mn catalyst, it is estimated to be below 50%. Moreover, strong interactions between Mn and Ce ions were observed, increasing oxygen mobility in the catalyst crystal lattice and affecting the activity of Mn-Ce catalysts.
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页数：13
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